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The mean PCa stiffness at 60 Hz in the positive LNM group (5.22 ± 0.81 kPa) was significantly higher than that in the negative LNM group (3.24 ± 0.93 kPa, P < 0.001) (a). And the mean PCa stiffness at 90 Hz in positive LNM group (7.11 ± 1.08 kPa) was significantly higher than that in negative LNM group (4.71 ± 1.13 kPa, P < 0.001) (b)
